| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Broadband tunability of surface plasmon resonance in graphene-coating silica nanoparticles |
| Zhe Shi(史哲)1, Yang Yang(杨阳)1,2, Lin Gan(甘霖)1, Zhi-Yuan Li(李志远)1 |
1. Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2. Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education), Department of Physics, Beihang University, Beijing 100191, China |
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Abstract Graphene decorated nanomaterials and nanostructures can potentially be used in military and medical science applications. In this article, we study the optical properties of a graphene wrapping silica core-shell spherical nanoparticle under illumination of external light by using the Mie theory. We find that the nanoparticle can exhibit surface plasmon resonance (SPR) that can be broadly tuned from mid infrared to near infrared via simply changing the geometric parameters. A simplified equivalent dielectric permittivity model is developed to better understand the physics of SPR, and the calculation results agree well qualitatively with the rigorous Mie theory. Both calculations suggest that a small radius of graphene wrapping nanoparticle with high Fermi level could move the SPR wavelength of graphene into the near infrared regime.
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Received: 22 January 2016
Accepted manuscript online:
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PACS:
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78.67.Wj
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(Optical properties of graphene)
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78.67.Bf
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(Nanocrystals, nanoparticles, and nanoclusters)
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11204365 and 11434017) and the National Basic Research Program of China (Grant No. 2013CB632704). |
Corresponding Authors:
Zhi-Yuan Li
E-mail: lizy@aphy.iphy.ac.cn
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Cite this article:
Zhe Shi(史哲), Yang Yang(杨阳), Lin Gan(甘霖), Zhi-Yuan Li(李志远) Broadband tunability of surface plasmon resonance in graphene-coating silica nanoparticles 2016 Chin. Phys. B 25 057803
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